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Financing Receivables (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Jan. 01, 2018 | Dec. 31, 2017
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Financing receivable | $ 119 |  | $ 119 |  |  | $ 194
Argentina [Member] |  |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Financing receivable | 83 |  | 83 |  |  | 177
Other Entity [Member] |  |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Financing receivable | 9 |  | 9 |  |  | 17
PANAMA |  |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Financing receivable | 27 |  | 27 |  |  | $ 0
Fluence [Member] |  |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Business Acquisition, Percentage of Voting Interests Acquired |  |  |  |  | 50.00% |
Other Expense [Member] |  |  |  |  |  |
Financing Receivable Recorded Investment [Line Items] |  |  |  |  |  |
Allowance for other receivables | $ 0 | $ 15 | $ 0 | $ 15 |  |

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- Definition Percentage of voting equity interests acquired at the acquisition date in the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Net amount of the investment in a contractual right to receive money on demand or on fixed or determinable dates that is recognized as an asset in the creditor's statement of financial position. Examples include, but are not limited to, credit card receivables, notes receivable and receivables relating to lessor's rights to payments from leases other than operating leases that have been recorded as assets. Excludes trade accounts receivable with contractual maturity of one year or less and arose from the sale of goods or services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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